Ive heard that I should replace original cracked carbon resistors only with other carbon resistors, and use carbon film resistors in certain locations. How can I tell the difference between cracked carbons and carbon films?
Cracked carbon resistors are typically a 20% tolerance, i.e., no tolerance band. Carbon films were developed later and could be produced consistently to 10% (silver) and 5% (gold) tolerances. Carbon resistors are generally noisy, and the older production styles are worse than newer ones. Even jumping up to 1Ws makes only a modest improvement in performance. It is difficult to escape the poor performance of carbon resistors. If you are replacing resistors in your amp, it is my advice to use metal film types such as the Philips MRS25F. These have a 1% tolerance, which in itself is unimportant. What is important is their high degree of temperature stability – better than 50 ppm. This will reduce the likelihood of nuisance noises when the amp warms up. Any metal film resistor will have similar properties to the Philips type.
Related Questions
- Ive heard that I should replace original cracked carbon resistors only with other carbon resistors, and use carbon film resistors in certain locations. How can I tell the difference between cracked carbons and carbon films?
- Why did Kirk Douglas hire Kubrick to replace the original director on the film?
- Where are the original film locations for TCM 2?
